<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title>修改文本域随意调整大小的功能</title>
<style type="text/css" media="screen">
textarea {
	resize: none;
}		
</style>
</head>
<body>
	<form action="#" method="post">
		<textarea name="test" rows="10" cols="30" placeholder="修改文本域随意调整大小的功能"></textarea>
	</form>
</body>
</html>